projects / mirror_ubuntu-disco-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| df9ee292 DH |
2 | #ifndef _M68K_IRQFLAGS_H |
| 3 | #define _M68K_IRQFLAGS_H | |
| 4 | ||
| 5 | #include <linux/types.h> | |
| df9ee292 DH |
6 | #include <linux/preempt.h> |
| 7 | #include <asm/thread_info.h> | |
| 8 | #include <asm/entry.h> | |
| 9 | ||
| 10 | static inline unsigned long arch_local_save_flags(void) | |
| 11 | { | |
| 12 | unsigned long flags; | |
| 13 | asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory"); | |
| 14 | return flags; | |
| 15 | } | |
| 16 | ||
| 17 | static inline void arch_local_irq_disable(void) | |
| 18 | { | |
| 19 | #ifdef CONFIG_COLDFIRE | |
| 20 | asm volatile ( | |
| 21 | "move %/sr,%%d0 \n\t" | |
| 22 | "ori.l #0x0700,%%d0 \n\t" | |
| 23 | "move %%d0,%/sr \n" | |
| 24 | : /* no outputs */ | |
| 25 | : | |
| 26 | : "cc", "%d0", "memory"); | |
| 27 | #else | |
| 28 | asm volatile ("oriw #0x0700,%%sr" : : : "memory"); | |
| 29 | #endif | |
| 30 | } | |
| 31 | ||
| 32 | static inline void arch_local_irq_enable(void) | |
| 33 | { | |
| 34 | #if defined(CONFIG_COLDFIRE) | |
| 35 | asm volatile ( | |
| 36 | "move %/sr,%%d0 \n\t" | |
| 37 | "andi.l #0xf8ff,%%d0 \n\t" | |
| 38 | "move %%d0,%/sr \n" | |
| 39 | : /* no outputs */ | |
| 40 | : | |
| 41 | : "cc", "%d0", "memory"); | |
| 42 | #else | |
| 43 | # if defined(CONFIG_MMU) | |
| 44 | if (MACH_IS_Q40 || !hardirq_count()) | |
| 45 | # endif | |
| 46 | asm volatile ( | |
| 47 | "andiw %0,%%sr" | |
| 48 | : | |
| 49 | : "i" (ALLOWINT) | |
| 50 | : "memory"); | |
| 51 | #endif | |
| 52 | } | |
| 53 | ||
| 54 | static inline unsigned long arch_local_irq_save(void) | |
| 55 | { | |
| 56 | unsigned long flags = arch_local_save_flags(); | |
| 57 | arch_local_irq_disable(); | |
| 58 | return flags; | |
| 59 | } | |
| 60 | ||
| 61 | static inline void arch_local_irq_restore(unsigned long flags) | |
| 62 | { | |
| 63 | asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory"); | |
| 64 | } | |
| 65 | ||
| 66 | static inline bool arch_irqs_disabled_flags(unsigned long flags) | |
| 67 | { | |
| 3c776a07 GU |
68 | if (MACH_IS_ATARI) { |
| 69 | /* Ignore HSYNC = ipl 2 on Atari */ | |
| 70 | return (flags & ~(ALLOWINT | 0x200)) != 0; | |
| 71 | } | |
| df9ee292 DH |
72 | return (flags & ~ALLOWINT) != 0; |
| 73 | } | |
| 74 | ||
| 75 | static inline bool arch_irqs_disabled(void) | |
| 76 | { | |
| 77 | return arch_irqs_disabled_flags(arch_local_save_flags()); | |
| 78 | } | |
| 79 | ||
| 80 | #endif /* _M68K_IRQFLAGS_H */ |